William hochhausef



(No Model.)

W. HOGHHAUSEN.

DYNAMO ELECTRIC MACHINE.

No. 257,007. Patented Apr.2 1882.

m IJUUU m Y UNITED STATES PATENT OFFICE.

WILLIAM HOGHHAUSEN, OF NEW YORK, N. Y.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 257,007, dated April25, 1882.

Application filed February 17, 1882. (No model.)

To all whom it may concern:

Be it known that I, WM. HOGIIHAUSEN, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Dynamo -ElectricMachines, of which the following is a specification.

My invention relates to that portion of the machine known as thearmature or armature-carrier, upon which are wound or mounted the coilsof wire in which the induced currents are set up by the revolution ofthe carrier in a magnetic field.

Myinvention consists in acertain novel construction of the carrier, thatwill be specified in the claims, the object being to make a sectionalarmature-carrier the parts of which, with their surrounding coils ofwire, may be separately detached from the armature structure when it isdesired to remove or repair any coil or helix.

My invention also consists in a certain novel arrangement of the slotsthat are cut in the armature-sections to prevent the circulation ofinduced currents in the material of the armacure-carrier.

Referring to the accompanying drawings, Figure 1 is a top view of anarmature carrier embodying my invention with the bobbins of insulatedwire removed. Fig. 2 is an end view of the armaturecarrier. Fig. 3 is aperspective view of one section of the carrier and a portion of anadjacent section, one of the bobbins or helices being shown in place.Fig. 4 is a detail view, showing a clamp for clamping two adjoiningsections together at or near the middle of their abutting edges. Fig. 5is a perspective view of a modification, showing also the arrangement ofthe slots made in each section to prevent the circulation of inducedcurrents in the material of the armature-carrier.

Arepresents the shaft of the machine, to which are secured in theordinary mannerthe spider-frames to which the armature proper isconnected.

B B B represent'the arms of the spider-frame, which in the present caseare shown as connected by a circular rim, (J, for the purpose of givingstrength and stiffness to the structure. The part 0 may, however, beomitted, if desired. The sections of the armature are constructed andmounted upon these spider-frames in the following manner: Each sectionconsists of two longitudinal bars, D, parallel to the armatureshaft,connected by a series ofparallel segmental bars or rods, E, which may beconnected to the bars by riveting or in any other suitable manner, ormay be cast in one piece with them. The segments E in the same sectionare preferably separated from one another by small spaces to prevent thecirculation of induced currents and to allow the passage of air-currentsfor cooling the armature. Each bar D projects beyond the segments asufficient distance at either end to allow it to be supported upon andsecured to the spidert'rame, and to also, when the connecting-rim C isemployed, allow space for the wires of the armature between the end ofthe section and the spider-frame. The bars rest upon the spider-frame inthe manner shown in Fig. 2, and are held in place and prevented fromshifting upon the carrier by the clamps F, which are seated in notchesin the spidertrame and held down by screws or bolts.

G, Figs. 8 and 4, represents a clip, which embraces the bars of twoadjoining sections and prevents them from bulging out at the middle.This clip is prevented from dying 011' by the same bands which hold thewire of the armature down to the carrier.

The length circumterentially of each section is a matter of convenience.It may be made long enough to carry one, two, or more of the armattire-coils, but preferably there should be as many sections as thereare separate coils or bobbins.

In order to give as much mass as possible to the armattire-carrier whenof iron, andyet to prevent the circulation of induced currents, Isometimes employ the form shown in Fig. 5. Here each section is nearlysolid, the slots being distributed as shown and extending only partwaycircuint'erentially through thescction, but sutticiently far tooverlap some other slot in the section, so that no path is left for theinduced currents. The adjoining sections are fastened together by doubledovetails, as indicated at H, and are attached to the spiderframe by theprojecting rods, bars, or pins M, which are connected to the sections ofthe armature-carrier in any suitable manner and at any desired points.

I am aware that armattire-carriers made in sections are old, and I donot therefore claim such, broadly.

hat I do claim is- 1. The combination of the notched spider frame, thearmature-sections having longitudinal projecting bars or rods D, and theclamps F, secured to the spider-frame.

2. The combination, with the notched spiderframe, of the detachableannature-sections, each consisting of the longitudinal bars D, connected by a series of parallel bars or rods, E.

8. The combination, substantially as described, of the armature-sectionshaving the longitudinal projeetingbars or rods,the notchedspider-fran'ies, and the clamps seated in the notched spider-frames andembracing the ends of the bars or rods.

4. The combination, substantially as described, with two adjoiningdetachable armature-sections, each having a longitudinal bar or red, ofa clip, H, embracing the abutting bars so as to prevent bulging at themiddle.

5. An armature-carrier provided with slots distributed and arranged inthe manner shown, so that each slot extends only part waycireumferentiallyand only sufficiently far to overlap some other slot inthe same section.

6. The combination, substantially as de scribed, of the bars I) andtheir connectingsegments, the notched spider-frames, and the clamps Iembracing and clamping the ends of the abutting bars in two adjoiningsections.

\VILLIAM HOCHHAUSEN.

Witnesses:

H. U. TOWNSEND, Tues. TOOMEY.

